Comparison among depths of penetration of different targets subjected to rigid projectile impact

The ratios of depth of penetration (DOP) of different targets under the same penetration condition was investigated according to the dimensionless formula of DOP of different targets penetrated by a non-deformable projectile. Results show that various targets may be equivalent to each other. The applicable range of the equivalence and the feasibility of targets substitution were discussed by integrating the available test data.